Buff



. BRUCE BUFF Sept 2% 1932.

Filed Sept. 26, 1930 INVENTOR.

Patented Sept. 20, 1932 UNITED STAT A. J. BRUCE, OF BIRMINGHAM, MICHIGAN This invention relates to a bufi' for polishing and finishing and has for its object to provide, in a manner as hereinafter set forth, a bufi' so constructed as to have, when used what may be termed a cantilever efiect whereby the usability of the buff is decidedly advantageous.

A further object of the invention is to provide, in a manner as hereinafter set forth, a buif for the purpose referred to so constructed and arranged whereby it offers the same strength and the same resistance to wear in use as a polishing means as the buff grows smaller through such use.

A further object of the invention is to provide, in a manner as hereinafter set forth, a buff so constructed and arranged to provide a cantilever effect during use and whereby the buff is so constructed as to oifer resist ance to wear during the use thereof.

A further object of the invention is to provide, in a manner as hereinafter set forth, a bud so constructed and arranged to set up pockets for collecting the compound being used, when the buff is acting as a polisher and under such conditions increasing the polishing efiect.

A further object of the invention is to provide, in a manner as hereinafter set forth, a bufl formed of a plurality of plies of any suitable fabric and with the plies of like contour and further with the plies secured together by spaced zigzag rows of stitching whereby the buff will ofier a zigzag appearance from the top and with the efiect derived from the zigzag rows of stitching resulting in that the usability of the buff is decidedly advantageous.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a bufi which is simple in its construction and arrangement, unusually strong, durable, compact, thoroughly efficient in its use, readily assembled, and inexpensive to manufacture.

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically described, and illustrated in the accompanying drawing, wherein is shown an embodiment ofthe invention, but it is to be understood that changes, variations, and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawing wherein like reference characters denote corresponding parts throughout the several views 2-- Figure 1 is an elevation looking towards one face of the body of the bud.

Figure 2 is a View looking towards the edge of the bufi'.

Figure 3 is a section on a line 33, Figure 1.

Thebody l of the bud is formed from a plural ty of circular plies 2 of any suitable materlal. The body 1 is in the form of a dlsk and provided with a central opening 3. The plies 2 can be of any suitable thickness,

their thickness can be uniform or varying,

preferably the plies will be of uniform thickness. A substantial distance from the opening 3 the plies 2 are secured together by a circular row of stitching 4:.

That part of the body 1 between the row of stitching 4 and the edge of opening 3 is termed the central non-usable portion 5 of the buff and at such portion the plies 2 are secured together by any suitable arrangement or method of stitching by way of example as illustrated by the circular rows 6 and a spiral row 7 of stitching.

The portions of the plies of the body 1 between the circular row 4 of stitching and the edge of body 1 are secured together by a series of spaced, non-crossing, circular rows 8 of zigzag-stitching and a circular row of spaced groups of spaced rows 8 of non-crossing V stitching. The rows 8 are preferably equally spaced with respect to each other.

A like arrangement is had with respect to the rows 8. The outer row of the series of rows 8 is spaced from the edge of body 1. The rows ,8 have their ends at the edge of body 1 and extend inwardly from such edge. Each row 8 consists of a series of V-portions opening towards the axis of body portion. The V-rows 8' open towards the edge of body 1 and are oppositely disposed with respect to the said V-portions. Each V-row 8' opposes the side of a pair of V-portions of the outer row of the series of rows 8, that is to say that each cup of rows of V-stitching 8' 1s positioned between and extends from a pair of V-portions of the said outer row of the series of rows 8. Each V-portion and each row of V-stitching is in the form of a triangle. The V-portions of the rows 8 progressively 1ncrease in length towards the edge of body 1. The rowsof V-stitching 8' progressively increase in length from the edge of body 1.

The manner of setting up the rows of stitching 8, as well as the function derived therefrom will now be described.

The row of stitchin or circle 4 is divided into any desired num er of equal segments. With the ends of any segment as beginning oints if an imaginary straight line be drawn tween them such line wouldbe the base line of a triangle, the other two lines of which are drawn so that the apex of the triangle is towards the perimeter of the buff. These two lines are of any desired length equal or not. Similar triangles are then drawn between the ends of each of the other segments of the circle so that a series of connected similar triangles or rather arches is established upon the surface of the buff and together form a circular zigzag line upon the face of the buff,

. extend towards the perimeter of the body 1 are indicated at 9, 10.

From the center of the buff radii are drawn through each of the base points of the completed circle of arches and extending to the perimeter of the bufl? and upon these radii and at any desired distance apart are established base points for other series or circles or arches. From these base points the lines of the new series of arches are drawn parallel to the corresponding lines in the row already established until the entire surface of the buff, outside of the first drawn circle, is covered with zigzag lines of stitching forming arches pointing towards or beyond perimeter of the buff.

In each of the rows 8 of pointed arches corresponding lines are parallel and are equidistant from the corresponding lines in other rows and as the series of arches approach the perimeter of the buff the corresponding lines become longer, the angles remain the same while in the several series of arches nearest the perimeter these lines are broken as the perimeter of the buff cuts across them.

The significant features are that the arches are pointed, the angles are all equal, the rows of stitching are equi-distant from each other, all of which makes the bufl uniform in structure regardless of its diameter.

The groups of V stitching at the perimeter and the broken arches belowthe perimeter allfcontribute to the strength of the buff and to its resistance to wear in use as a polishing means, and, because of this unique method of sewing, the buff presents the same type of face, the same strength and the same resistance to wear in use as a polishing means as the buff grows smaller through such use.

In actual use the points on the perimeter covered by a line of stitching are naturally harder than the portions of the perimeter beflush with each other and providing a com-' posite circular disc, a circular row of stitch- 1ng securing said plies together at a point removed from the apertures of the latter, a series of concentrically arranged, spaced, noncrossing, endless rows of zig-zag stitching for securing said plies together at points between said first mentioned row and the outer edges of the plies, each zig-zag row formed of inwardly opening V-portions merging into each other at the inner end of the latter, the V-portions of said zig-zag rows progressively increasing in length from the inner to the outer row of the series, and a series of spaced groups of spaced non-crossing V-shaped rows of stitching arranged in a circular row for securing the plies together at points outwardly with respect to the outer row of said series and being oppositely disposed with respect to the V-portions of the zig-zag rows, the ends of each row of each of said groups terminating at the edge of the plies, and the V-rows of stitching of each group progressively increasing in length from the inner to the outer row of the group.

2. A buff comprising a series of axially apertured, opposed, abutting plies of fabric flush with each other and providing a composite circular disc, a circular row of stitclh ing securing said plies together at a point removed from the apertures of the latter, a series of concentrically arranged, spaced, non-crossing, endless rows of zig-zag stitching for securing said plies together at points between said first mentioned row and the outer edges of the plies, each zig-zag row formed of inwardly opening V-portions merging into each other at the inner end of the latter, the V-portions of said zig-zag rows progressively increasing in length from the inner to the outer row of the series.

3. A bull comprising a series of axially apertured, opposed, abutting plies of fabric flush with each other and providing a composite circular disc, a circular row of stitching securing said plies together at a point removed from the apertures of the latter, a series of concentrically arranged, spaced, non-crossing, endless rows of zig-zag stitching for securin said plies together at points between said rst mentioned row and the outer edges of the plies, each zig-zag row formed of inwardly opening V-portions merging into each other at the inner end of the latter, the V-portions of said zig-zag rows progressively increasing in length from the inner to the outer row of the series, a set of spaced concentric circular rows of stitching for securing the plies together adjacent the apertures of the latter, and a spiral row of stitching for securing the plies together between said set and first mentioned circular row.

In testimony whereof, I aflix my signature hereto.

A. J. BRUCE. 

